The advantages of breeder reactors is that the neutrons from the uranium + plutonium expended in the reaction are used to generate more fissile material (plutonium and in some designs other fissionable transuranic elements). In other words you are getting two thing out of one. This allows nearly complete use of the uranium that was mined instead of just the 0.7% of it that is uranium-235 that other reactors are limited to using, reducing the waste of depleted uranium.
The disadvantages of breeder reactors are:
Advantages:
1) the neutrons from the uranium+plutonium expended in the reaction are used to generate more fissile material (plutonium). Thus you kind of get a two-for-the-price-of-one deal going there.
Disadavantages
1) has to be cooled with liquid sodium
2) even more complicated and expensive than a normal reactor
3) potential for misuse of plutonium by terrorists.
They can produce more fissile fuel than they consume, from U238 or thorium. However the fuel cycle has to involve chemical treatment of the irradiated material, which is a costly process with undesirable radioactive by products. At present there is no great incentive to develop such reactors but this could change in the future.
they create less radioactive waste.
There are many ways that a Nuclear Fission Reactor is used, 1) To produce Plutonium or Tritium for Bombs. 2) To generate Electricity.
A Nuclear Reactor generates Electricity that is clean and Cost efficient. But the Main disadvantage is That a steam or hydrogen-oxygen explosion can cause a lot of environmental impacts.
they don't exist yet. they're building one, but construction hasn't started yet.
A breeder reactor produce more fissile material than consume. I suppose that very serious disadvantages doesn't exist.
Nuclear fusion reactors do not exist yet as we don't know how to build them. All nuclear reactors are nuclear fission reactors.
Zero, there are no practical fusion reactors. All existing prototype designs for fusion reactors take far more energy input to make them run than they generate.
In tokamak reactors, approx 300 million degC
Mostly power plants operating with fission reactors. Also experiments with nuclear fusion, and nuclear weapons
Plenty of cheap fuel, and no radioactive waste.
No. Our reactors are fission reactors. We haven't yet mastered fusion reactors for power.
Yes, stars are fusion reactors.
Well, fusion bombs are, but fusion reactors should not be (if we can build them).
Nuclear fusion reactors do not exist yet as we don't know how to build them. All nuclear reactors are nuclear fission reactors.
In test reactors.
There are fission and fusion reactors. However, at present (2016) there is no commercial fusion reactor which can produce more energy than is required to operate it.
Zero, there are no practical fusion reactors. All existing prototype designs for fusion reactors take far more energy input to make them run than they generate.
There are fuel pellets and laser beams inside fusion reactors. But note that we have not build a successful one. The technical problems are overwhelming at this point.
randomly in the jobs and fights
Terry Kammash has written: 'Fusion reactor physics' -- subject(s): Fusion reactors
yes. If they ever perfect hydrogen fusion reactors, then maybe someone will have to come up with a clearer description, but until now, they are the same.
Mostly in test reactors, though some operational reactors (though only a small number) are in service. Also, if you have ever heard of an H-bomb, or a hydrogen bomb, that is nuclear fusion.